Brake for rotary winding drums



March 310, 1925- C. D. REYNOLDS v BRAKE FOR ROTARY WINDING DRUMS Filed Feb. 8,1923 l 2lsheets-sheek 2 Patented Mar. 10, 1925..

' iirrs siATEs CLARENCE D. REYNOLDS, F WHITTIER, CALIFORNIA.

BRAKE FOR ROTARY WINDING DRUMS.

App1ication filed February 8, 1923. Serial No. 617,705.

T 0 all whom it may concern:

Be it known that I, CLARENCE D. REYNOLDS, a citizen of the United States, residing at Whittier, in the county of Los Angeles and State of California, have invented new and useful Improvements in Brakes for Rotary Winding Drums, of which the following is a specification.

This invention relates to brake apparatus and more particularly. to brakes for rotary winding drums.

An object of the present invention is to provide a winding drum brake designed to efi'ectually grab or clutch the cylindrical face of a brake drum when the drum isto be stopped and which brake band is designed to effectively release, substantially without drag upon, the brake drum when tension of the brake band is removed. An other object is to provide a brake band of sectional construction and having means in the form of hinged joints and stop elements at the joints to prevent the unbuckling or opening movement of the band beyond predetermined condition.

Another object is to provide means for normally relaxing the brake band from its associated drum so as to release the drum, and in this connection it is an object to provide automatically acting means to relax the brake band.

A. further object is to provide a brake band of sectional construction in which the sections are hirigedly connected and are also provided at the hinge connections with means tending to normally expand the brake band and maintain it in a relaxed position substantially uniformly throughout the length of the band.

@ther objects and advantages will be made niani est in the "following specification of an embodiment of the invention illustrated in the accompanying drawings,

where 1 Figure 1 is a side elevation of the improved brake band in the relaxed position as to its associated drum.

2 is a side clevzn the band and tragn being in contract Fig. 3 is a detail anchored end of the anchors. F11 at is a plan of ill'lit the attached oi n of Q'ment oi oi the drum; the ing position.

.1 vatiou of-the e band and its tensioning device band, and showing means for slacking up the band when the tensioning device is released.

Fig. 5 is a side elevation and vertical section of the braking apparatus in which a modified form of the brake relaxing means is shown; the brake band being in distended position.

Fig. 6 is a sectional view of a fragment of the contractedbrake band and a fragment of the drum. I

Fig. 7 is a plan of a fragment of the band.

Fig. 8 is a perspective of one of. the extending springs.

The brake band adapted'to be used. in various mechanical organizations, and in the present case is shown as associated with an end drum or cylindrical member which may form a portion of a rotary winding reel, for instance. The improved brake bandconsists of a number of substantial arcuate sections f cylindrical dimensions corresponding to the drum D. Each of thesections 2 are hingedly or pivotally connected as by pintles 3 transversely arra ged and received in suit-able b'earine; cars l and 5 formed complementary to be alined at meeting ends of the brake sections 2. A sufficient number of the sections are assembled to form a brake band of desiredinstan cc, as by substantial stay bolts 6 which may be mounted in any suitable fixed structure. The opposite end of the brake band is in the usual, or any suitablemanner, attached to an appropriate form of tensioning device which may consist of a rock shaft- 7 having a crank 8 connected in bearing lugs 9 9 attached to thecontiguous end section of the brake band, as clearly shown in Figs. 1 and i.

A. feature of the present invention is to provide means for limiting the opening or expanding action of the jointed link sections 2, and such means may consist ofsuitable stops shown as including, in the present case, fingers 10 each fixed to one oi? the links and straddling the hinge joint and reaching toward and over the outer face of the next contiguous link. In the contracted position of the band as shown in Fig. 2, the fingers 10 are spaced slightly beyond and are, there fore, out of contact with the band sections. Should the sections swing relatively to each other in expanding to a predetermined d oi the present inventiongree they will be engaged by the'contiguous ends of the fingers 10 and, therefore, further expanding or relative outward bilckling of the link connections will be prohibited.

Preferably, the brake band sections 2 are provided with suitable linings 2 to take the wear of action on the brake drum D.

The relaxation ofthe brake band may be' action upon the drum D by rotation of the rock shaft 7 so as, by means of the crank 8,

to draw the band tightly around the drum during which time the springs 13 will be further compressed. Rotation of the rock shaft 7 in the opposite direction decreases the tension of the band and this is further slacked by the loosening reaction of the springs13.

In Figs. 6 to 8 inclusive 'a form of band relaxing means is shown as, including spring devices arranged at the hinge joints of the several sections, and such devices are shown "springs 16 being to tend to swing each of as including substantial springs 16, one end of which may be secured to a contiguous link, while the opposite end 7 crosses the hinge joint and is operatively connected to the'next contiguous link; the action of the the link sections in an outward position with respect to the center of the band.

It-will be understood that either form of brake relaxing device, or the combination of them, may be utilized. 3

It is understood that a brake holding device may be employed, such for instance as a ratchet wheel 20 fixed on the rock 'shaft and engaged by a yielding pawl 21.

.band consisting of a number of pivotally connected-sections, and means for limiting movement of the pivoted sections in one 'dircction on their pivots, said means including fixed stops attached to the ends of certain sections to overlap ends of next adjacent section's.

2. In a drum brake apparatus, a brake band consisting of a number of pivotally connected sections, fingers secured to corresponding ends and agains the outer faces of the sections to cross the joints and limit the swing of the sections in open directions. 3.In a drum brake apparatus, a brake band consisting of a number of pivotally connected sections, substantial springs secured to corresponding ends of the sections and against their outer faces and crossing the joints-and means forming sliding connections between the free ends of the springs-and the adjacent sections to which the springs are attached, the tension of the springs being exerted to open the band.-

In testimony whereof I have'signed my name to this specification. 4 CLARENCE D. REYNOLDS. 

